主要由单片机系统及显示电路、超声波发射电路和超声波检测接收电路三部分组成。采用STC89C51来实现对CX20106A红外接收芯片和7404的控制-Mainly by the SCM system and the display circuit, ultrasonic transmitter and ultrasonic detection circuit receiving circuit consists of three parts. STC89C51 to achieve the CX2